# Polysleep Sierra vs Pure Green Organic Latex (Medium): Firmness, Price, and Construction Compared

Canonical: https://squishmat.com/compare/polysleep-sierra-vs-sleep-on-latex-pure-green-organic-latex-medium · Data refreshed 2026-10-03 · Source: SquishMat

Same feel and similar price — the Pure Green Organic Latex (Medium)'s denser foams give it the durability edge.

## Full spec table

| Spec | Polysleep Sierra | Pure Green Organic Latex (Medium) |
| --- | --- | --- |
| Type | Foam | Foam |
| Firmness | 6/10 | 6/10 |
| Height | 9" | 9" |
| Queen price | $795 | $799 |
| Price range (all sizes) | $695–$895 | $799 |
| Foam densities (lb/ft³, top → bottom) | 3.0 / 1.4 | 4.5 / 4.5 |
| Coil gauge | — | — |
| Coil count (queen) | — | — |
| Cooling | 5/10 | 7/10 |
| Motion isolation | 7/10 | 6/10 |
| Edge support | 5/10 | 6/10 |
| Pressure relief | 8/10 | 7/10 |
| Support | 6/10 | 8/10 |
| Natural materials | 2/10 | 9/10 |
| Notable features | Entry-level all-foam bed, 3 PCF comfort foam, Simple two-layer build, Lowest Polysleep price | 8" of solid natural Dunlop latex, Organic cotton knit cover over wool batting, No polyurethane foam anywhere in the build, GOLS, Oeko-Tex and Greenguard Gold certified |
| Spec source | NapLab | Manufacturer |

## Key differences

- The Pure Green Organic Latex (Medium) uses denser foam (lowest layer 4.5 vs 1.4 lb/ft³) — density is the best single predictor of how long foam lasts before it sags.
- The Pure Green Organic Latex (Medium) scores notably better for sleeping cool (7/10 vs 5/10).

## Who each mattress is for

**Polysleep Sierra:** The Polysleep Sierra has a medium feel that works for many side and back sleepers, and for combination sleepers who switch positions. Strengths: Excellent pressure relief at the shoulders and hips.

**Pure Green Organic Latex (Medium):** The Pure Green Organic Latex (Medium) has a medium feel that works for many side and back sleepers, and for combination sleepers who switch positions. Strengths: Strong, even support that keeps the spine aligned; Built largely from natural materials like latex, wool, or cotton.

## FAQ

### Which is firmer, the Polysleep Sierra or the Pure Green Organic Latex (Medium)?

They rate the same: both are a 6/10 on the firmness scale, a medium feel that works for many side and back sleepers, and for combination sleepers who switch positions.

### Which is cheaper, the Polysleep Sierra or the Pure Green Organic Latex (Medium)?

The Polysleep Sierra is cheaper in a queen: $795 versus $799, as of 2026-10-03.

### What is the main construction difference between the Polysleep Sierra and the Pure Green Organic Latex (Medium)?

Both are foam builds, but the Pure Green Organic Latex (Medium) uses meaningfully denser foam, which generally predicts better durability. Full per-layer densities are in the table above.

## More

- [Polysleep Sierra — full specs](https://squishmat.com/mattresses/polysleep-sierra)
- [Pure Green Organic Latex (Medium) — full specs](https://squishmat.com/mattresses/sleep-on-latex-pure-green-organic-latex-medium)
- [Comparison matrix: every mattress we track](https://squishmat.com/compare)

Free to cite with attribution — link to the canonical page. Where a datapoint traces to a third-party teardown, please credit the original measurer too (sources are cited per bed on https://squishmat.com/mattress-database).